125898161729 has 2 divisors, whose sum is σ = 125898161730. Its totient is φ = 125898161728.

The previous prime is 125898161707. The next prime is 125898161731. The reversal of 125898161729 is 927161898521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79173016129 + 46725145600 = 281377^2 + 216160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125898161729 is a prime.

Together with 125898161731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125898161759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62949080864 + 62949080865.

It is an arithmetic number, because the mean of its divisors is an integer number (62949080865).

Almost surely, 2^125898161729 is an apocalyptic number.

It is an amenable number.

125898161729 is a deficient number, since it is larger than the sum of its proper divisors (1).

125898161729 is an equidigital number, since it uses as much as digits as its factorization.

125898161729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 59.

The spelling of 125898161729 in words is "one hundred twenty-five billion, eight hundred ninety-eight million, one hundred sixty-one thousand, seven hundred twenty-nine".